Compliant balloon



FIG. 1 is a side perspective view of a compliant balloon showing our new design;

FIG. 2 is a left side elevation view thereof;

FIG. 3 is a right side elevation view thereof;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is a top plan view thereof.

The broken lines show portions of the design that form no part of the claimed design. 

CLAIM The ornamental design for a compliant balloon, as shown and described. 